Close-loop Single shear and Double Displacing Pressure Testing Machines Parameters
Pressure testing of materials or components is used in many applications such as checking the strength and integrity of material joints or seals, or to verify performance or durability claims made by manufacturers. Close-loop single shear and double displacing pressure testing machines are designed to provide precise, repeatable readings of such pressure tests. This article will explain the parameters of these two types of pressure testing machines in detail.
Close-loop single shear pressure testing machines feature a two-position workhead that is used to apply the necessary pressure to the material or component being tested. The workhead is operated by a servo motor, and the applied force is displayed and recorded on an onboard controller. The motor has a range of speed and torque adjustments, and is programmed to apply to the specified force and to hold the position for a predetermined period. The results of the test are recorded as a pressure versus time result, and are archived to provide an accurate record of the results.
Double displacing pressure testing machines function in a similar manner, but instead of a single workhead, the machine has a pair of opposing plungers, which are actuated by a servo motor. This configuration allows for precise control over the applied force, increasing accuracy and repeatability of results. The two plungers travel oppositely along a set length, and the force is recorded separately for each individual plunger as it is applied. As with the single shear machine, the pressure results are archived and used to identify trends and develop test protocols.
Close-loop single shear and double displacing pressure testing machines provide a reliable, repeatable method to measure the strength and integrity of materials and components. By controlling the applied pressure, it is possible to accurately identify failures, to compare different samples and materials, and to develop testing protocols. Because these machines are designed for accuracy and repeatability, they are used in environments ranging from quality assurance laboratories to production lines.
The parameters of close-loop single shear and double displacing pressure testing machines must be set correctly to ensure accurate and consistent results. The most common parameters to adjust are the displacement speed, the maximum and minimum pressure, and the pressure frequency. The speed at which the plunger is moved must be set depending on the material being tested, as this affects the rate of deformation and the time it takes for the test to be completed. The maximum and minimum pressure are set to the required values indicated by the manufacturer. Lastly, the pressure frequency must be adjusted so that the test results are repeatable and reliable.
Overall, close-loop single shear and double displacing pressure testing machines are used in many industries to accurately and repeatably measure the properties of materials or components. By controlling the parameters of the machines and following proper test protocols, it is possible to attain consistent, reliable results.
